Efficiency Assessment of Modular Multilevel Converters for Battery Electric Vehicles
Efficiency Assessment of Modular Multilevel Converters for Battery Electric Vehicles
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DOI：
10.1109/tpel.2016.2557579
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发表时间：
2017-03-01
影响因子：
6.7
通讯作者：
Piegari, Luigi
中科院分区：
文献类型：
--
作者：
Quraan, Mahran;Tricoli, Pietro;Piegari, Luigi
本文评估了集成电池单元的模块化多电平变换器作为纯电动汽车牵引驱动装置时的性能。在这种拓扑结构中，单个电池单元连接到转换器子模块的直流链路，允许最高的放电和充电灵活性。传统的电池电动汽车的电池管理系统被转换器的控制所取代，转换器单独平衡所有电池。作为牵引驱动器的转换器的性能进行评估的扭矩-速度特性和功率损耗的全频率范围内，包括磁场削弱。基于功率器件的拓扑关系，采用简化模型计算了模块化多电平变换器的导通损耗和开关损耗。模块化多电平变换器的性能，然后与传统的两电平变换器进行比较。最后，通过对牵引传动小规模样机的实验测试，验证了模块化多电平变换器的损耗模型。
This paper evaluates the performance of modular multilevel converters with integrated battery cells when used as traction drives for battery electric vehicles. In this topology, individual battery cells are connected to the dc link of the converter submodules, allowing the highest flexibility for the discharge and recharge. The traditional battery management system of battery electric vehicles is replaced by the control of the converter, which individually balances all the cells. The performance of the converter as a traction drive is assessed in terms of torque-speed characteristic and power loss for the full frequency range, including field weakening. Conduction and switching losses for the modular multilevel converter are calculated using a simplified model, based on the datasheet of power devices. The performance of the modular multilevel converter is then compared with a traditional two-level converter. The loss model of the modular multilevel converter is finally validated by experimental tests on a small-scale prototype of traction drive.